To make money. While Switzerland comes close, it’s done in by 40 franc/hour babysitters and 8 franc coffees. I’ve said in the past that the US has a few distinct advantages over the rest of the world:
- As a place to make and save money, due to high income, relatively low cost-of-living, favourable tax rates, and the best financial service industry in the world.
- For higher education (see # of US universities in the world ranking list)
- For the sheer amount of natural beauty in its national parks
Of course it also has many failings, which most people will be familiar with.